This is a very good product. The precise cutting and smooth texture create a solid product. The material is completely different from cheap ones, as you would expect from a high-quality item. The craftsmanship is admirable. Since the corners are not chamfered, they are stable and easy to stack high, allowing for stress-free play. It has been used very little, if at all. It is very clean. Commitment 1: 【The Best Materials】 It uses birch wood, which is ideal for building blocks. The more you use it, the more it will fit in a child's hands, and as the wood rubs against wood, it will develop a marble-like shine! Commitment 2: 【Utilizing Excellent Processing Technology】 Calculations are made down to the loss from the thickness of the saw blade, and without using sandpaper, the final finish is done with a plane! It is carefully made with this top-notch technology. ■ Third Gift (Building Blocks) Set Contents: 8 cubes, wooden box included ■ Material: Birch ■ Weight: 250g ■ Fourth Gift (Building Blocks) Set Contents: 8 rectangular prisms, wooden box included ■ Material: Birch ■ Weight: 250g ■ Fifth Gift (Building Blocks) Set Contents: 21 cubes, 6 large triangular prisms, 12 small triangular prisms, wooden box included ■ Material: Birch ■ Weight: 700g ■ Sixth Gift (Building Blocks) Set Contents: 18 rectangular prisms, 12 receivers, 6 pillars, wooden box included ■ Material: Birch ■ Weight: 700g